Cooling system for internal-combustion engines



AMnETZZ 1924c COOLING SYSTEM FOR INTERNAL, COMBUSTION ENGINES IAQQQ'H J. v. GIESLER am lll Filed April 27, i 1 Q Q I 1% w N I v 5 I illlm,

a Roma 21 5 than, 22, .i a ll EN f @FFMQEO JEADT V. GEESLER, @F KNUKVILLIE, TENNESSEE, ASSIGNOR TO THE FUlLTON CQMPANY, 01F ml'OXV'ILLE, TENNESSEE, A CORPORATION OF MAINE.

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Application filed earn at, uni; Serial no. teases.

To all whom-2'25 may concern: comprising means for forcing a fluid Be it known that l, JEAN V; GIESLEZR, through a conduit and valve mechanism for a citizen of the United States of America, regulating the passage of the fluid through and aresident oflKnoxville, Tennessee, have such conduit, said valve mechanism being invented a new and useful Improvement in operated by thermosensitive means shown as W Cooling Systems for Internal-Combustion subjectedto the medium flowing through the Engines, which invention is fullyset forth cooling system. In order that the cooling mein the following specification. dium may be maintained in continuous cir- This invention relates to cooling systems culation, a bypass is preferably provided for internal combustion engines and, while around the radiator and the valve mechacapable of use with a Wide variety of ennism operated by the pressure motor con gines of this type, has particular utility trolsthe flow of cooling medium through when applied to the cooling of an automoeither or both of the radiator and bypass. bile engine. V Said thermosensitive means is also preflii object of this invention is to provide erably so constructed that upon failure of a system for circulating a cooling medium the temperature control, as by leakage of in "heat-interchanging relation with an in the thermostatic vessel, the last-named valve tcrnal combustion engine With valve mech-mmechanism will assume atposition of safety 'anism for regulating the flow of coolingv thatjjill prevent the occurrence of dangerous 20 medium through said system and-improved, conditions in the cooling system. i 4 thermostatically controlled means for op- The invention is'capable of receiving a, crating such valve mechanism. va lety of'mechanical expresslons,'one of Another object of this invention is to pro which is shown on the accompanyin drawvide a coolingsystem-of the type characing," but 'it is to be expressly understood terized with operating means for the valve that such drawing is for purposes of illus mechanism Which is actuated by power dctration only and is not to be construed as rived, from the engine itself. j afdefinition of the limits of the invention, A further object of this invention is to reference being had to the appended claims provide a system of the type characterized for that purpose. I

30 With a, pressure motor for operating the The drawing shows someWh at.,dia-gram- 5 valv mechanism engine-driven ineans for matically an elevation, partly in section. of developing pressure and thermosensitive a cooling systemfor an internal combustion means for controlling the degree of presengine embodying the present invention. sure transmittedto said pressure motcr. Referring in detail to said drawing, 1 35 j Other objects relate to the provision of designates the cylinder or cylinders of an acooling systemfor internal combustion eninternal combustion engine, the 'same being, gines' that is simple in construction, inex-' provided: With the, usual engine jacket pensive-to manufacture, easily installed and through which it is" designed a cooling meefficient in operation. 1 .dium shall be circulated, 2 designates any Stated broadly, theinvention consists. in suitable form of radiator, 3 the outlet manithe combination of a-cooling systemfor in- Jfold, 4 the connections from the outlet maniternal combustion engines, shown as comfold to 'the radiator, and 5 the connections prising an engine jacket, a radiator. 'and between the radiator and the inlet manifold connections therebetween, with valve mech- 6. As showmany suitable form of circulati 45 anism for regulating the flow-ofcooling; ing pump? maybe interposed between the medium through said system, a pressure radiator and the inlet manifold to maintain motor for. operating said valve mechanism, a circulation through the system. It is to means, preferably driven by the engine, for b expressly understood, however,- that the developinga'nd transmitting pressure to the the'rmo-siphon system of circulation may I pressure motor, and means, preferably." be employed, if desired. thermostatically controlled, for regulating ltn the construction shown upon the drawthe degree of pressure transmitted to said ing, a bypass 8 around the radiator is inpressure motor. In the preferred emboditerposed betw eenthe connectionsft leading ment of the invention, said pressure motor is from the engine acket to. the radiator and in communication With a circulating system the connections 5 leading from the radiator to the pump and engine jacket.

with a valve housing vpipe 12 with trolled. While any 1 be employed, the construction illustrated on i M. Fulton, No.

In the.

form illustrated, said by-pas's communicates and positioned within the housing 9 is suitable valve mechanism for controllingtthe flow of the cooling mediiun throughthe' radiator and engine jacket and, where a bypass is employed as shown, for-controlling the-flow of cooling medium through the-bypass. While a wide variety of valve mechanisms maybe employed, that shown comprises a pair of seating valves 10 and 11 designed to cooperate withports 12 and 13 respectively formed in partitions within the housing 9. Valve memberlO and port 12 control the flow of cooling medium through the radiator while valve member 11 and port 13 control the flow of cooling medium through the by-pass 8, v g Y A pressure motor l t-is provided for operating the valve members 10 and 11, the same being desirably housed in an extension 15 of the valve housing 9. In the form shown, said pressure motor comprises a flexible wall' in the form of an expansible and collapsible corrugated-metal vessel havingone end wal 16 fixedly secured tothe housing 15 and its opposite and-movable end wall 17 (connected to the valve members 10'and 11 by-a stem 18. Vessel 14 is in communication through a circulating system shown as comprising a.- tank 26, designed to contain any suitable fluid as oil or water, asuitable pump communicates through pipe connections 24:, said housing 23 communicatingwith tank 19 through pipe 25. Within the valve housing 23 is positioned any suitable form of valve 26-to regulate the passage of fluid through the circulating system thus prov vided.

In the preferred embodiment of this invention, valve 26 is thermostatically consuitable thermostat may a thermostat of the the drawing comprises in the patent to W.

general type disclosed 191 1. lutthe form shown, an expansible and collapsible corrugated resilient vessel 27, having one end wall fixedly held in position by the valve housing 23 and its opposite and movable end wall 28 connected to valve by stem 29, is in communication through a pipe 30 with a bulb 31 subjee id to the cooling medium, preferably at a point \vhsreat said medium has substantially-the temperature with which it leaves the engine iacket. Obviously the bulb 31 could be positioned at any other suitable point, if desired.

A by-pass is preferably provided around the pumn 21 and controlled by a relief valve so as to bypass the valve mechanism 26 and 9 in the connections 5,

v against valve 33 1 end bulb 31, pipe 21, shown as a rotary pump, communicating with said tank through pipe 22, and a valve housing 23 with which the pump valve member 1,102,035", granted June 30,

.in the. pipe 30 to the and the valve. 26 is moved toward closed poprevent the building up of too high a pressure in the circulating system. In the form shown, a valve housing 32 communicates at its opposite ends with the-pipe connections 22 and 24, and contains a suitable valve 33 normally pressed into engagement with its seat 34: by a spring 35. Said spring bears at one end and at its op-.

posite end is operatively engaged with a collar 36 formed on a screw-threaded spindle 37 operating in a nut provided on the housing 32, said spindle 37 having a suitable hand-wheel 38 upon its outer end whereby,

dium, whereby vessel 27 is normally collapsed against a suitable elastic force which, p

when the vesselis made of resilient material, may be more or less inherent in thereof.

lVhen the engine is started, the cooling medium is cold, vessel 27 is collapsed, valve 26 is open and pump 21 draws the fluid from tank 20 and returns it thereto through valve housing 23.

12 and valve member 11 has opened vwide the port 13 leading from bypass 8.- lhe cooling medium is now circulated by the pump 7 through theengine jacket, outlet manifold 3,'c onnections'1, by-pass 8, and

connections 5 back to the engine jacket. s I

none of the cooling medium passes through the radiator, such medium quickly heats to that temperature erates most efficiently. Ihe thermostat being constructed or adjusted to operate at said last named temperature a further increase of temperature causes an expansion of vessel 27 because of the corresponding increase of pressure in the. thermosensitive fluid contained within the bulb. 31, which pressure is transmitted through the fluid fluid in said vessel,

sition, causingthe pump 21 to build up a pressure I in the pipe connections 24. As pipe 19 and vessel 14 are in open communication with the connections 24, this pressure is transmitted to the movable end wall of vessel 14 causing an expansion of this vessel together with a proportionate opening the valve 26 is closed,

the Walls- Vessel 1 1 is then collapsed, 10 is in'engagement with port at which the engine op- I of vessel 27, with a corresponding closing of e usa the position of the valve members 10; and 11.

A further increase in temperature of the cooling medium causes a further expansion valve .26 and an increase of pressure transmitted to the vessel 14c, to ,still further open valve member 10 and close valve member 11. Thus the proportion of cooling medium flowing through the radiator is regulated to maintain the temperature in the'cooling system that at which the engine'operates most etiiciently. In case vessel 27- so :tar expands as to entirely close valve 26 mp 21. cannot build up such a pressure within the circulating system and vessel 14 as to cause a rupture of the parts, as, at a predetermined pressure determined by the adjustment of spring 35, valve 33 will open against the tension of said spring and permit the fluid from tank 20 to be returned around the pump through the bypass provided. When the engine stops, the pump 21 also stops if it be driven from the engine, and the pressure, it any, inthe vessel 14 is relieved.

to permit the resiliency inherent in or acting on said vessel to move the valve member 10 to closed position and prevent further circulation of the cooling medium through the-radiator. A

In case off failure or the temperature control, as -by a leak in the vessel 27, the

equalization of the internal and external pressures acting on said; vessel will unbalance the elastic force inherent in or otherwise cooperating with the walls thereof, permitting said-vessel to expand, closing valve 26 and'causing the pump 21 to maintain the maximum pressure .within the vessel 14. Thereby the valve 10 will be kept'open and valve 11' kept closed, the entire coolingrmedium-being passed through the radiator and subjected to the cooling influence thereof.

While the embodiment illustrated on the drawing has been described with considerable particularity, it is to be expressly un bustion engines, the combination of an em gine jacket. a radiator. connections therebetweeu. valve mechanism for regulating the flow of cooling-medium through said system, acirculating system, and means controlled by the pressure in said circulat ing system for operating said valve mechanism. V

lna cooling system 101' internal coinbustion engines, the combination of an en gi'ne jacket, a. radiator. connections therebetween, valve mechanism for regulating the flow of cooling medium through said s'ystem, a circulating system, means controlled by-the pressure in said cir ulating system for operating said valve mechanism,

and means for regulating the pressure in said circulating system. 7

3. In a cooling system. for internal combustion engines. the combination ofan engine jacket, a radiator.- connections there between, valve mechanism for regulating the flow of cooling medium through said system, a circulating system. means controlled by the pressure in said circulating system for operating said'valve mechanism, and thennosensitively-controlled means for regulating the pressure in said circulating system. I

lc-lln a cooling system for internal combustion, engines, the combination oi an en gine jacket,a radiator, connections therebetween, valve mechanismfor regulating the flow of cooling medium through said system, a circulating "system, means controlledby the pressure in saidcirculatingsystem for operating said valve mechanism, and means controlled by the temperature of the cooling medium for regulating the pressure in said circulating system.

5. In a cooling system for internal combustion engines, the combination of an engine jacket, a radiator. connections there-' between, valve mechanism for regulating the How of cooling medium through said system. a conduit, means for forcing a fluid through said conduit, means for restricting the flowv of 'fiuid through said conduit to build up pressure therein, and meansacbustionengines, the combination of an enginejacket, a radiator, connections therebetween, valve mechanism for regulating the flow of-cooling medium through said system. a conduit, means for forcing a fluid through said conduit, thermosensitivelycontrolled means for restricting the flow of fluid through said conduit to build up pressure therein, and means actuated by the pressure developed in said conduit for operating said-valve .mechanism.

7. l[n'a coolingsystem for inte'rnal combustion engines, thecombination of an enginejacket, a radiator. connections therebetween. valve mechanism for regulating the flow of .cooling medium through said system, a conduit, means for forclng a fluid 'by said engine-driven meansto saidnpres bustion engines,

the How of cooling medium through said through said conduit, means controlled by the temperature ot the cooling medium for restricting the flow of .th-1id-through,said conduit to build up pressure therein, and means actuated by the pressurev developed in said conduit for operating said valve mechanism. i

S. In a cooling system for internal combustionengines, the combination of an engine jacket, a radiator connections therebetween, valve mechanism for regulating the flow of cooling medium tiroughsaid system, a pressure motor for ope valve mechanism, means driven by the, en gine and operative only While the engine is. in operation. for transmitting pressure to said pressure mptor, and means for 1 0v.- erning the degreeof pressure transmitted sure motor.

9; Ina cooling system bustion engines, the combination of an engine jacket, a radiator, connections there'- between, valve mechanism for regulating the flow of coolingv medium through said system, a pressure motor valve mechanism, means driven by the engine and operative only while the engine is in operation for transmitting pressure to said pressure motor, tively-controlled means for governing the degreeof pressure transmitted by said ehgine-driven means to said pressure motor.

10. In a cooling system for internal combastion engines','thecombination of an engine jacket, a radiator, connections therebetween, valveimechanism for regulating the flow of cooling medium through said stem a .ressure motoixfor o eratin said 7 i t: v

system, a pressure motor for operating said valve mechanism. a circulating system in communication with said pressure motor, and means for regulating the pressure 'in said circulating system 12. In a'cooling system for internal com.- bustion engines, the combination of an en'- gine jacket, a radiator, connections therebetween, valve mechanism for regulating the flow of cooling medium through said system,'a pressure motor for operating said valve mechanism, a circulating system in communication with said pressure motor,

rating said for internalcom;

for operating said and thermosensi- I cooling medium and thermosensitively-controlled means for regulating, the pressure in said circulating system. v c

13'. In a cooling system for internal combustion engines, the combination of an engine jacket, a radiator, connections therebetween, a by-pass around the radiator, valve mechanism for regulating the flow of cooling medium through saidradia-tor and lay-pass, a circulating system, and means controlled by the pressure in said circulating system for operating said valve mechanism.

14. In acooling system for internal coinbustion engines, the combination of an engine jacket, a radiator, connections therebetween, a by-pass around the radiator, valvemechanism for regulating the flow oi cooling medium through said radiator and by-pass, acirculating system, inc-ans con-- trolled by the pressure in system said circulating for operating said valve mechanism, and means for regulating the pressure in said circulating system.

15. In a cooling system for internal combustion engines. the combination of an enginejacket, a radiator, connections there between, a by-pass around the radiator. valve mechanism for regulating the flow of cooling medium through said radiator and by-pass, a circulating system. means controlled by the pressure in said cir ating system for operating said valve met :ramsm, and thermosensitively-controlled means for regulating the pressure in said circulating system. i

i 16. In a coolingisystem'for internal com.- bustion engines, the combination of an en- .gine jacket, a radiator, connections therebetween, a bypass around the radiator, valvemechanism for regulating the How of through said radiator-and bypass, a circulating system, means 'controlled by the pressure in said circulating system for operating said valve mechanism. and means controlled by the temperature of the cooling medium for regulating the pressure in said circulating system. 17.-In a cooling. system for internal combustion engines, the combination of an engine jacket, a. radiator, connections therebetween, a by-pass around the radiator, valvemechanism for regulating the flow of cooling medium through said radiator and by-pass, a conduit, means for forcing a fluid through said conduit, means for restricting the flow 0t fluid through said conduit to develop pressure therein, and means actuated bythe pressure developed for operating said valve mechanism.

18. In a cooling system for internal combustion engines, the combination of an enine 'acket a radiator connections there 2 ii 2 ,7

,between. a by-pass around the radiator.

valve mechanism for regulating the flow of in said conduit ill) cooling medium through said radiator and bypass, a conduit, means for forcing a fluid through said conduit, t'hermosensitively-controlled means for restricting the flow of fiuid through said conduit to develop pressure therein, and means actuatedby the pressure developed in said conduit for operating said valve mechanism.

19. In a cooling system for internal combustion engines, the combination of an engine jacket, a radiator, connections therebetween, a by-pass around the radiator, valve mechanism for regulating the flow of cooling medium through said radiator and by-pass, a pressure motor for operating said valve mechanism, means driven by the engine and operativ only while the engine is in operation for transmitting pressure to said pressure motor, and thermosensitive means for governing the degree of pressure transmit-- ted by said engine-driven means to said pressure motor. v

20. In combination with a system for circulating a cooling medium in heatinterchanging relation with an internal combustion engine, valve mechanism for regulating the circulationof cooling medium through said system, a pressure motor for operating said valve mechanism, a conduit in communication with said pressure motor, means for forcing a fluid through said conduit, valve mechanism for regulating the passage of fluid through said conduit, and thermosensitive mcans for operating said last-named valve ,mechanism, said last-named valve mechanism having a position of safety and said thermosensitive means being so con-' structed as to move said last-named .valve mechanism to said position of safety upon failure of the temperature control.

21. In combination with a system for circulating a cooling medium in heat-interchanging relation with an internal-combustion engine, valve mechanism for regulating the circulation of cooling medium through said system, means driven by the power of the engine for operating said valve mechanism, and a thermostatic valve adapted to be closed upon increase of engine temperature to increase the power of said engine driven means to operate .sa1d valve m ech-v anism. a

22. In combination with a system for circulating a cooling medium in heat-interchanging relation with an internal combustion engme, valve mechanism for regulating.

the circulation of cooling medium through said system, a pressure motor for operating said valve mechan1sm, means driven by the power of the engine for operating said pres sure motor, and a valve for controlling the operation of said pressure motor.

23. In combinationwith a systemfor circulating a cooling medium in heat-interchanging relation with an internal combustion engine, valve mechanism for regulating the circulation of cooling medium through said system, a pressure motor for operating said valve mechanism, means driven by the power of the engine for operating said pressure motor, a valve for controlling the operation of said pressure motor, and a. thermostat for operating said valve.

24. In combination with a system for circulating a cooling medium in heat-interchanging relation with an internal combustion engine and including a radiator, valve mechanism for controlling the circulation of cooling medium through said radiator, a pressure motor for operating said valve mechanism, and engine-driven means for actuating said pressure motor and operating to effect the closure of said valve mech anism upon the stopping of said engine.

25. In combination with a system for cir- Y culating a cooling medium 1n heat-1nter' changing relation with an internal combustion engine and includinga radiator, valve mechanism for controlling the circulation of cooling medium through said radiator, a pressure motor for operating said valve mechanism, and means driven by theengine for supplying fluid to said pressure motor and operating automatically to effect the closure of said valve mechanism upon the stopping of said engine.

26. In combination with a system for circulating a cooling medium in heat-interchanging relation with an internal combustion engine and including a radiator, valve mechanism for controlling the circulation of cooling medium through said radiator, a pressure motor for operating said valve mechanism, means driven by the engine for In testimony whereof have signed this specification.

JEAN GIESLER. 

